PREMISES AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Premises and Equipment, gross	$ 242,736	$ 238,939
Accumulated depreciation	(146,504)	(142,605)
Premises and Equipment, net	96,232	96,334
Depreciation expense	9,100	9,700	9,600
Restructuring charges	2,948
Rental expense	8,500	8,100	8,200
Operating lease future minimum payments due [Abstract]
2014	6,515
2015	6,204
2016	5,687
2017	5,175
2018	4,835
Thereafter	31,035
Total future minimum lease payments	59,451
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, gross	14,739	14,322
Buildings [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, gross	101,626	99,833
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	P5Y
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	P40Y
Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, gross	111,670	106,217
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	P3Y
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	P10Y
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, gross	10,905	11,000
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	P2Y
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	P20Y
Equipment Leases to Customers [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, gross	$ 3,796	$ 7,567